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Advisories

rustls before 0.23.46 Denial of Service via Brotli Certificate Decompression

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Severity
medium
Date
Affecting

  • rustls >= 0, < 0.23.46

CWE
  • CWE-770 Allocation of Resources Without Limits or Throttling
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
rustls before 0.23.46 contains an uncontrolled memory allocation flaw in its optional Brotli certificate decompression, which limits decompressed output size but accepts an input-selected large history window. Malicious peers can send a certificate with a five-byte Brotli header requesting up to 1 GiB before authentication, aborting Brotli-enabled clients or client-authenticating servers whose allocator cannot satisfy the request.

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